package com.nowcoder.community.controller;

import com.nowcoder.community.entity.DiscussPost;
import com.nowcoder.community.entity.Page;
import com.nowcoder.community.entity.User;
import com.nowcoder.community.service.DiscussPostService;
import com.nowcoder.community.service.LikeService;
import com.nowcoder.community.service.UserService;
import com.nowcoder.community.util.CommunityConstant;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * @author szq
 * @create 2023-01-19 0:44
 * @description 主页
 */
@Controller
public class HomeController implements CommunityConstant {

    @Autowired
    private DiscussPostService discussPostService;

    @Autowired
    private UserService userService;

    @Autowired
    private LikeService likeService;

    @GetMapping({"/index", "/"})
    public String getIndexPage(Model model, Page page,
                               @RequestParam(name = "orderMode", defaultValue = "0") int orderMode) {
        // 方法调用前，SpringMVC会自动实例化Model和Page,并将Page注入Model.
        // 所以，在thymeleaf中可以直接访问Page中的数据
        page.setRows(discussPostService.findDiscussPostRows(0));
        page.setPath("/index?orderMode=" + orderMode);

        List<DiscussPost> list = discussPostService.findDiscussPosts(0, page.getOffset(), page.getLimit(), orderMode);
        List<Map<String, Object>> discussPosts = new ArrayList<>();
        for (DiscussPost post : list) {
            Map<String, Object> map = new HashMap<>();
            map.put("post", post);
            User user = userService.findUserById(post.getUserId());
            map.put("user", user);

            // 查询点赞数量
            long likeCount = likeService.findEntityLikeCount(ENTITY_TYPE_POST, post.getId());
            map.put("likeCount", likeCount);

            discussPosts.add(map);
        }
        model.addAttribute("discussPosts", discussPosts);
        model.addAttribute("orderMode", orderMode);
        return "index";
    }

    @GetMapping("/error")
    public String getErrorPage(){
        return "error/500";
    }

    @GetMapping("/denied")
    public String denied() {
        return "error/404";
    }

}
